Mouldboard or breast of plow



Dec. 17, 1957 sHlNJlRo TAKAKITA ETAL 2,816,498

MOULDBOARD OR BREAST 0F PLOW Original Filed Aug. 15, 1952 Tsutomu Tokakifu I8 Akira Takakita ATTORNEY) HIE United States Patent() MOULDBOARD R BREAST 0F PLOW Shnjiro Talrakita, Shoichi Takakita, Minoru Takakita, Tsutomu Takakita, and Akira Takakita, Nabari-Cho, Nakagun, Mieken, Japan Original application August 15, 1952, Serial No. 304,662,

now Patent No. 2,785,617, dated March 19, 1957. Dizgtegoaznd this application January 11, 1957, Serial No.

4 Claims. (Cl. 97-123) This invention relates to plows and more specifically to the mouldboards or, as they are sometimes designated, the breasts thereof, and this application is a division of our application for United States Letters Patent Serial No. 304,662, filed August l5, 1952, and now Patent Number 2,785,617.

An important object of the invention is to provide a skeleton mouldboard which may be adjusted as a unit with respect to a plowshare and plow frame, and also the individual ribs of the mouldboard adjusted with respeci: to the plowshare and frame, so as to expedite and improve plowing operations.

Another important object of the invention is to provide a mouldboard including a plurality of spaced-apart ribs which ribs may be warped or twisted to assume selected positions with respect to the plow frame and share so that the soil will be more readily lifted, turned, sheared and pulverized than in the case of rigid skeleton ribs of skeleton mouldboards and, consequently, the amount of labor reduced in plowing.

Still another important object of the invention is to provide angularity adjusting means for the mouldboard which provides for such means disposed well inwardly of the edges of the mouldboard and for ready manipulation of a pin to effect adjustment in conjunction with an elongated opening with converging walls. This has been found a very desirable non-rigid construction and tends to prevent breakage of the ribs.

Other objects and advantages of the invention will be apparent during the course of the following detailed description of the invention, taken in connection with the accompanying drawing, forming a part of this disclosure and in which drawing:

Fig. l is an elevation of a plow, with the mouldboard in vertical section.

Fig. 2 is a rear elevation of the mouldboard of Fig. 1 removed from the plow frame, with portions of the structure in section.

Fig. 3 is an elevation of portions of angularity adjusting means of the mouldboard of Figs. 1 and 2.

Fig. 4 is an elevation of a part of the angularity adjusting means of Fig. 3.

In the drawing, wherein for the purpose of illustration is shown a preferred embodiment of the invention and wherein similar reference characters designate corresponding parts throughout the several views, the letter A designates a frame of a plow; B, a plowshare; C, the adjustable mouldboard of this application; D, a support means for the mouldboard; and E, means to rock the plowshare B and mouldboard C.

The frame A may be of conventional construction and includes a body portion 5, handle portion 6 at the upper end of the body portion, and landside 7 at the lower end of the body portion and extending forwardly therefrom.

At the forward end of the landside 7 is the plowshare or, as it is more commonly called, share B, having a point body portion 10 and an upwardly and rearwardly inclined shinpiece 11, providing a rst support means for 2,815,498 Patented Dec. 17, 1957 ICC the mouldboard C and which share is movably carried by the landside for controlled limited rotation upon a forwardly and rearwardly extending horizontal axis, vas is well known in the art.

The adjustable mouldboard C, being of skeleton form, includes a plurality of spaced-apart, elongated, upwardly and rearwardly inclined, bowed ribs 15, which are longitudinally twistable. Each rib has an elongated, narrow body portion 16, with upper and lower faces, a lowermost downturned flange 17, substantially parallel, downwardly-extending side flanges 18, and an uppermost rearwardly-extending ange 19, which may be narrower than the flange 17. The material of the ribs 15 is such that the ribs may be twisted-or partly canted or warped. Spring steel is a well-known material having the necessary characteristic. Preferably, as shown in Fig. 2, the ribs vary in length so as to provide an upwardly curved upper edge profile for the mouldboard as a whole, and are normally inv substantially the same inclined plane.

Preferably, adjacent the upper ends of the ribs 15, they are joined together by connection means 20 which is shown as an elongated bracket body portion 21 which may be a substantially at strip, as of steel, extending p with its longitudinal axis normal to the longitudinal axes of the ribs, and provided with a plurality of feetv or lugs 22, one for each rib, rigid with the portion 21 and exi tending, in parallelism, normal thereto, from a longitudinal edge thereof. The feet or lugs may be secured rigidly to the ribs in any approved way, such as by conventional rivets 23. At substantially the center of the portion 21 is a pivot opening 24 for a pivot member 31 to be subsequently described.

First support means 25 for and constituting a part of the mouldboard C, includes an elongated support or bracket body 26, secured to the upper end portion of the shinpiece 11 in any approved way, such as by conventional welding for rotative movement therewith, and having a downwardly inclined elongated ange 27 at its upper end. Projecting upwardly in substantial parallelism from the flange 27 are a plurality of spaced-apart pivot pins 28, one for each rib 15, since their upper end portions extend through suitable pivot openings in the central portions of the anges 17, whereby there is provided means loosely connecting the lower end portions of the ribs to the support or bracket body 26.

The angularity adjusting means 30 for the ribs 15 of the mouldboard C, includes an elongated pivot member 31 projecting upwardly from and rigid with the central portion of the flange 27 to move therewith, and extending through the pivot opening 24, and being beneath the central of the ribs 15. Rigidly carried by an intermediate portion of the pivot member are a pair of bracket bodies 32, one of which is shown in Fig. 4, which project normal thereto in spaced-apart relationship and may be relatively short flat plates or rigidstrips eachv having a` longitudinally-extending slot 33 on one end portion thereof, with the size of the slot enlarged at intervals to form pin shank-receiving openings 34, 35 and 36 (three being shown, by way of example). At the other end portion of the bracket bodies is a pivot pin opening 37 for a pivot pin 3S which pivotally connects an actuator member 39 to the bracket bodies. The actuator member 39 comprises an elongated body portion 40 and an upwardly turned terminal portion 41 at each end, with these terminal portions constructed and arranged so that the outermost ribs 15 will rest upon the end faces 42. However, as the actuator member 39 is pivoted on the pivot pin 38, which extends through an opening 43 in the actuator body, oiset from the center of the latter, one terminal portion will bear or press against one of these outermost ribs while the other terminal portion will move 3. away from the other outermost rib in order to twist or cant them.

Means 45 to adjustably limit the degree of such twisting or: Gauting, employed in-.conjunctionwith' the -openingsEuIai 35-or 36, comprisesan.- enlargement-46A of-a part ofthe body portion 4u-to provide 'asinglefelongated slot on opening 47 having side walls converging toward-thefpivotapin 38, and with-V the" openings" 34; 35i and- 36 seen-through the slot 47 when ther longitudinal` axes ofV the' brackets 32- and elongated body portion 40 are parallel.` Adaptedto` extend'throughtheslot 47 and through anyy of the aligningopenings34g v35` or 36,is a. removable pin 48`which-is constructedf to t snugly in'. any of* the/"openingsk 35l or 36.` It-isobviousfthatg When-thepin`-4Sis2inthefopenings 34,tl'leactuatonl member 39"' cannot' move--independently off the bracketibodies 32,-butwhenit`is inthepenings.- 35y thev actuator member 39 'willhavef some limitedl playy in` two directions,` and whenV thel pin 48 is in( thev openings 36', the actuator memberwill havev additional` play iny two directions.- In` the irst' case, as the/'pivotv member '3L is rotated, the bracketbodies32am-actuatormember willmove: in: unison att all` times whiley irr-thesecond case, there willbeamoderatewarping `ofi theY ribs l'butyinlthe third case, there-will vbe a.decidediwatpinga.` e ect;-

T-heconstructionoftheangularity adjusting-,means 30J is suchl thatthere is afloating connection ofL the actuator member. 39fwith1the youtermost-ofA the ribs`-15 since. the actuator-member is -notatta'ched t'o them; but the Guten' most-ofthe ribsfnormally resttuponftheffaces 42 ohthew actuator member?4 andthe# ribsfmay; turnorfrockoli-#theirg pivot-pins 38 -to-a limiteddegree.

An additional support lmeans D isnprovidedlfor supporting'themouldbo'ard- Gupon the'plow framefAi Such rmay be a hook xedly carried bythefbody portions-ofthe plow" frame adjacent the upperT end thereot`;-withn thefbill 50ofthe-hookl adapted to enter 2x1-suitable eyenorropening-l. 51-in1thelongitudinal centeri of the freeend part ofthe bracketbody portion L21".

Means E to rockl theplowshare B and, att the same time rock theiplowshare C and causel ca-ntingor warping` of'y the ribs 15,` is: shown as` an elongated substantially L-shaped'rodA 55'having-.a handle 5'6at its upper endyad# jacentthe handle 6,- and rotatablyextending, -at=its other-or horizontal end-58 through=the landside` 7 to extend" outwardly of.v the forwardend thereoftosupport-af-bracketl arm 57 xedthereto Whchdepends from and is-rigid withl the elongated bracket-body 26. and depends from `thecenterthereof.

Fromthe above,l it will be` seen that the -ribs15f are as-` sociated so`thatthe. mouldboa-rd =may be quicklyfadjusted asia whole or the-ribs-wa-rped or twisted-in vorder-Ato.v dis pose parts.- oftheirf body' portions 16 diagonally with respectY to t the mouldboard asa` whole; This, of cours'e;- will increase the. areas.` betweenVA adjacentv portionsofL thef ribs and provide ai somewhat: shearing eiect-ujgnonthe.- soil, wherebyy thefplow` will-be aptkto travel more' readily throughthesoil'andther soil well-pulverized. Thezspecic elongated opening 47 provides for some play, when the ribs are more denitely warped or twisted; s0 that' they will not tend to break, as when an. obstruction is encountered. The structures 32, 40 and 48 are disposed well inwardly of the outer edges of the-mouldboard so that loosened soil will not be apt to lclog the openings 34, 35, 36 and 47 nor dislodge thepin 48:, yetthellatterisreadily accessible forV manipulations thereof.

Variouschang'esmay beniade' to the" shape, size' andl arrangement of: parts without departing from the spirit of the invention or the scope 0f the following claims.

What is claimed ist i. An-l a'djusrabie mouldboara' for` a pluigh; comprising" a plurality off spaceda'p'art* inclined longitudinally twistable ribs, each having an outer face and upper' and lower end portionsw-itheach lface normally in substantially the same inclined plane; a rotatable support carried by said plough; means loosely connecting-` said lower end portionsto saidsupportgconnecting means for rigidly interconnecting said ribs; and` angularity adjusting means carriedby said support to Warp said ribs longitudinally so thatjportionsof likey faces thereof move outl ofy said' plane, including an elongated pivot member lrigid with and: extending. fromV thel center o f said rotatable Asupport to rotate therewithandrotatably carried/by said connecting.

means, a bracketfbo'dy carried by said pivot member and extending normalthere'tofandprovided with a row of a pluralityI ofspaced-apartV pin-accommodating openings, an actuator member having portions in contact with the outermost of-.said ribs, pivotwmeans pivotingsaid actuator member tosaid bracket body ata location at one side of the-center of said-actuatofmeinber,.said actuator member having. Aal1-elongatedY slot with Aopposite longitudinal walls th'ereofconverging':towardsaidpivot means, vsaid elongated slot being ata location at the othenside of the center ofsaid!actuator` memberf and normally aligning'with all of'A saidH openings', one of saidv openings normally opening. at the narrowestpartzof said slotand the others of said openings beingv normally spacedfrom the planes of the converging longitudinal wallsofsaid slot; yand aremovable. pintsnugly. accommodatedtin one ofV said openings and extending into rsaid slot and` constructed and arrangedv tobe'inse-rtel into any of said openings.

2l An adjustable mouldboard according to claim 1 characterized in that said portions of'said actuator member areupturned-terminal portions withn end faces inface contact with.'theunderwface/s of said outermost ofsaid ribs.-

3'1' adjustable mouldboardj accordingt to claim l characterized in that said row is a` straight row extendingslongitudinally *ofi* saidactuator member.

4.y An adjustable mouldboard according vtvcl'airn l` cliar-A acter-ized-in that saidbracket body and pin are confined tot ther intermediate portionv ofthe under face of said mouldboard.

No references" cited'. 

